Piston meter



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W. T. FOX.

PISTON METER. No. 11.10.408.4 Patented Sept. 3, 1889.

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No. 410,408. Patented Sept. 3, 1889.

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(N0 Model.) 3 Sheets-Sheet 3.

W. T. FOX.

PISTON METER.

No. 410,408. Patented Sept. 8, 1889.

UNITED STATES PATENT OFFICE.

VILLIAM T. FOX, OF ROCHESTER, NEV YORK.

PISTON ETER.

SPECIFICATION forming part of Letters Patent No. 410,408, datedSeptember 3, 1889.

Application led February 2l, 18884 Serial No. 264,757. (No model.)

T 0 all whom it may concern:

Be it known that I, VILLIAM T. FOX, of

i the city of Rochester, in the county of Monroe and State of New York,have invented a new and useful Improvement in Liquid-Meters, of whichthe following is a specification.

This invention relates to an improvement in that class of liquid-metersin which a reciprocating piston is employed which is actuated bytheliquid passing through the meter, and in which the valve mechanismcontrolling the admission of the liquid to opposite ends of the meterand its discharge therefrom is operated by the reciprocating piston.

The object of myinvention is to produce a meter of this character whichshall be simple, light, and compact in construction, accurate inoperation, and which can be manufactured at comparatively small cost.

The invention consists of the improvements which will be hereinafterfully described, and pointed out in the claims.

In the accompanying drawings, consisting of three sheets, Figure l isahorizontal section of my improved liquid-meter. Figi) is a similar viewwith a portion of the measuring-cylinder broken away and showing thevalves reversed. Fig. 3 is a vertical longitudinal section taken throughthe measuring-cylinder. Fig. et is a central cross-section of the meter.Fig. 5 is a cross-section in line fr a, Fig. l.

Like letters of reference refer to'like parts in the several iigures.

A represents the horizontal measuringcyl inder, provided in its outerside with a central inlet a, and B Bare two piston-heads reciprocatingin the measuring-cylinder and rigidly connected together by a rod b, soas to constitute a duplex or hollow piston.

C represents a primary-valve chamber arranged on the inner side of themeasuringcylinder A and communicating therewith by a central opening c,arranged opposite to the inlet a.

d d are two sliding piston-valvesarranged in the primary valve chamber Cand connected together by a valve-rod d2, so as to constitute theprimary valve. The valve-rod cl2 is provided with two arms orprojections d, arranged in the measuring-cylinder A, and which arestruck alternately by the reciproeating pistons B B', thereby shiftingthe Ivalves d d. The arms di are formed on a v.shank di', which passesthrough the opening c and is secured in a socket formed in the.valve-rod d2 by a screw-bolt d4. By this construction the arms d3 canbe removed for inserting and withdrawing the valves d d and 'the arms besecured to the valverod from the interior of the cylinder A after thevalves are inserted int-o the valve-chamber.

E E represent two rectangular chambers or passages arranged adjacent tothe primary-valve chamber C and closed at both zends. The passages E Eare connected with the primary-valve chamber C by openings e c',arranged near the inner ends of said passages. The sliding valves d dalternately open and close the communication between the cylinder A andthe passages E E.

F represents a secondary-valve chamber located outside of the chambersor passages E E and placed in communication with the latter by openingsf f arranged near opposite ends of the secondary-valve chamber F.

g g g2 are sliding piston valves arranged in the secondary-valve chamberF and connected by a rod g3, so as to constitute the secondary valve.The movement of these valves is limited by stems g4, arranged at theouter ends of the valves g g2, and which strike the end walls of thevalve-chamber F.

h is a passage arranged between the inner ends of the longitudinalchambers or passages E E and connecting the primary and secondary valvechambers O F. The transverse passage 7L is arranged in line with theinlet a and opening c, as clearly shown in Figs. 1 and 2.

I I represent two rectangular passages or channels arranged on the outerside of the secondary-valve chamber F andl separated by a centralpartition i, arranged in line with the transverse passage h. Thepassages I I communicate with the secondary-valve chamber F by means ofopenings jj, arranged near the inner ends of said passages.

la k are ports connecting opposite ends of the measuring-cylinderAwiththe outer ends of the channels or passages I I. The valves g g g2alternately establish and cut off the communication between theprimary-valve chamber C and the passages or channels I I.

L, Figs. 4 and 5, represents a rectangular TOO discharge-chamberarranged below the valvechambers C F, the chambers E E, and passages II. The discharge-chamber L is provided with an outlet l. Thesecondary-valve chamber F is provided in its bottom with openings m marranged on opposite sides of the passage h, and whereby it is placed incommunication with the discharge-chamber L.

n n. represent relief-openings formed in the bottom of the primary-valvechamber C on opposite sides of the openings c e', and through which theliquid contained in said chamber on the outer sides of the valves d descapes into the discharge-chamber L.

O represents a horizontal shaft, which is journaled in a suitablebearing O, arranged centrally in the upper side of the cylinder A andprojecting with its inner end into the latter.

p is a rock-arm pivoted with its bifurcated upper end to the inner endof the shaft O, and engaging with its lower free end in a slot p',

formed in the piston-rod h, as shown in Fig. 3.l

q is a ratchet-wheel secured to the shaft O between the bifurcated endsof the rock-arm p, and q is a weighted actuating-pawl pivoted to therock-arm p and engaging with the ratchet-wheel q.

Any suitable and well-known registering mechanism Ris connected with theouter end of the shaft O.

The reciprocating motion of the connectingrod b imparts a rockingmovement to the arm p, and the latter in turn imparts an intermittentrotary motion to the shaft O.

The inlet a being connected with the supply-pipe, and the parts being inthe position represented in Fig. 1, the water or other liquid enteringthe measuring-cylinder A between the pistons B B passes through theopening c, passage h, opening-j', channel I', and port It into theright-hand end of the cylinder A behind the piston B', and forces thelatter toward the opposite end of the cylinder. The liquid contained inthe measuring-cylinder in front of the piston B is forced through theport lo, channel I, and opening j into the secondary-valve chamber F,andfrom the latter into the discharge-chamber L through the opening fm.When the piston B has almost reached the limit of its stroke, it strikesthe adjacent arm cl3 of the valves d d and shifts the latter to theposition shown in Fig. 2, in which position of said valves thecommunication between the chamber E and the cylinder A is closed by thevalve d', while the communication between the chamber E and the cylinderA is opened. A portion of the liquid passes from the cylinderAthroughthe openings c e, chamber E, and opening finto the secondary-valvechamber F behind the valve g, and shifts the latter, with the valves gg2, to the position indicated in Fig. 2. Communication is nowestablished between the opening c of the primary-valve chamber C and thechannel I through the openings 77. and j, while that between theprimary-valve chamber and the channel I is cut off by the Valve 4g Theliquid now passes from the measuring-cylinder A through the opening c,passage 7L, opening j, channel I, and port 7c into the left-hand end ofthe measuring-cylinder behind the piston B, and forces the latter towardthe opposite end of the cylinder. The liquid in the cylinder in front ofthe piston B escapes into the discharge-chamber L through the port k',channel I, openingj, andthe opening min the secondary-valve chamber.Just before the piston B arrives at the end of its stroke it strikes theadjacent arm cl3 of theyalves dd and shifts the latter, when the courseof the liquid is again reversed, the valves g g g2 are again shifted tothe position represented in Fig. 1, and the liquid again acts upon theopposite piston B.

The liquid contained in the primary-valve chamber C behind the valves dd escapes into the discharge-chamber L directly through therelief-openings n fn, while the liquid contained in the secondary-valvechamber F behind the valves g g2 escapes into said discharge-chamberthrough the openings f f',

Achambers E E', openings e e, and reliefopenings n n.

The registering mechanism is actuated at every alternate stroke of thepiston and records each time the quantity of water passing through themeter during the backward A and forward movement of the pistons.

The detachable heads A of the cylinder A are preferably formed in onepiece with the detachable end walls S of the valve-chambers C F,chambers E E, and passages I I and the ports lo lo are formed in saidend walls.

A packing of rubber or other suitable material is interposed between thecylinder A and its heads and between the walls S and the ends of theseveral chambers and passages.

Suitable supporting-legs s are formed on the bottom of themeasuring-cylinder A and the discharge-chamber L, as represented inFigs. 8 and 4L.

It will thus be seen that the secondary valve controls the admission ofthe liquid to the ends of the measuring-cylinder and the escape of theliquid therefrom, and that the primary valve controls the admission ofthe liquid to the secondary-valve chamber for shifting'the valve, sothat the position of the secondary valve is controlled indirectly by thepiston, the latter shifting directly the primary valve, which in turnoperates the secondary valve by directing the liquid against one or t-heother end of the secondary valve.

My improved meter is very simple and compact in construction. All thevalves thereof have a long bearing-surface, which renders the samedurable, and all of the parts of the meter are conveniently assembledand capable of easy access. The liquid is discharged from the meter in acontinuous stream, and the meter contains no movable parts which IOO IIO

It is obvious that my improved meter may be employed as a Water-motor byextending the piston-rod h through suitable stuffingboxes in the headsof the cylinder A and taking the power therefrom.

I claim as my inventionl. The combination, With the measuringcylinder Aand pistons B B, of a primary-w valve chamber C, connected with themeasuring-cylinder, slidingvalves d d', arranged in the valve-chamber Cand having arms d3 projecting into the measuring-cylinder and actuatedby the pistons B B, chambers or passages E E', communicating with theprmary-valve chamber C, a secondary-valve chamberF, communicating withthe primaryvalve Chamber C and the passages E E', sliding valves g g g2,arranged in the secondaryvalve chamber F and operated by the pressure ofthe liquid, chambers I I', communicating with said secondary-valvechamber, ports k k', connecting said channels with opposite ends of themeasuring-cylinder, and a discharge-chamber L, communicating with thesecondary-valve chamber F, substantially as set forth.

2. The combination, With the measuringcylinder A and the duplex pistonsB B', of a primary-valve chamber C, connected With theneasuring-Cylinder and provided with reliefopenings n n', sliding valvesd d', arranged in the valve-chamber C and having arms d3, actuated bythe pistons B B', chambers or passages E E', communicating with theprimary-valve chamber C, a secondary-valve chamberl F, communicatingWith the primaryvalve chamber C and the passages E E and havingliquid-escape openings 'm m', sliding Valves g g g2, arranged in thesecondaryvalve chamber F and operated by the pressure of the liquid,channels I I', communicating with said secondary-valve chamber, ports k7c', connecting said channels with opposite ends of the1neasuring-cylinder, and a discharge-chamber L, substantially as setforth.

3. The combination, with the measuringcylinder A and the pistons B B',of the valvechamber C, provided with detachable end walls S andcommunicating with the cylinder A by an opening c, sliding valves d d',arranged in the valve-chamber C and connected by a valve-rod cl2, andarms or proj eotions d3, arranged in the cylinder A and attached to ashank projecting through the opening c and detachably secured to thevalve-rod, substantially as set forth.

Witness my hand this 7th day of February, 1888.

VILLIAM T. FOX. Vitnesses:

CARL F. GEYER, CHESTER D. HOWE.

